Saw guard



Patented Cet. 16, 1928.

UNITED; STATES PLINY E. HUSSEY, OF BEVERLY, MASSACHUSETTS.

saw GUARD.

Application filed January 9, 1928. Serial No. 245,319.

l raised into inoperative position.

Anotherv object of the invention is to provide arnovel saw guard which will not become clogged by the ice particles thrown up by the saw during its operation. g A A AAOther objects of the invention are to pro vide a saw guard having various novel features all aswill be more fully hereinafter set forth.v I e ln the drawings wherein I have illustrated a selected embodiment of my invention, Fig. 1 is a side elevation of an ice-cutting machine showing the saw guard in place, said figure illustrating the Vsaw in working, position,"

Fig. 2illustrates the position of the guard when the saw is raised from the work, vsaid View showing the opposite sideof the guard from that shown inFig. 1; Y

Fig. 3 is a fragmentary plan view ofthe guard showing the method of attaching it to the machine. o k

The ice-sawing machine herein illustrated is similar to that shown in-my above-mentioned Patent No. 1,648,181. This comprises a sled or carriage 1'on whichfis mountedy a 35 power plant 2,`thelatter preferably being in the` form of an internal combustion engine. Thispower plant operates an ice-cutting 'saw 3 which is rotatably mounted inthe end of a vertically-swinging tubular `arm 4, said arm -being pivoted tothe Aframeat 5, allfasl described in said patent.

p The sawis moved vertically to raise it from the ice 6 or to lower it into cutting position through the mediumfof` a` cord 7 which is ata direction pulley 8 lcarried by the frame and leads to an arm 9 on a rock shaft 10, said rock shaft having another arm 11 thereon which is connected by a flexible connection 12 to a shaft 13 on which it is wound. This shaft is provided witha handle 14 for operating it and by means of this conatruetionthe tached to the tubular arm 4fand passes overy arm 4 and thesaw 8 can be raised and lowered all as shown in the aboveementioned patent.

My improved guard is constructed to enclose the saw both while it is in operative position shown in Fig. 1 and when it is in raised or inoperative position as shown in Fig."2." The guard is in the form of a cage in whichthe saw is received and which is open kat the bottom to permit the saw to be projected therefrom. The saw guard is mounted so that it can move vertically relative to the saw and it is provided with runners which reston the ice when the saw is in its lowered or operative position, the saw at such time projecting through the openbottom of the guard and into 'the ice. When the saw is raised from the ice it will first move upwardly in the guard while the latter remains restingon the ice until the saw is entirely carried into the guard after which the guard willA be lifted with the saw as shown in Fig. 2.

The guard comprises two similar side walls indicated generallyat 15 which kare located either side of the saw and which are connected by cross bars 16. The sides 15l have askeleton or open-work formation, each vside comprising a peripheral stripV or band 17 andV spaced barsI or straps `18, said bars or straps being connected by the crossstrap19. These bars and straps 16, 17, 18 and 19 may be secured together in any suitable way either byy rivet'- ing-or welding and theyk provide a guard h'aving open-work sides and a peripheral portion. The sides 15 are not connected at the lower edges thereby providing an opening in the bottom of the guard which is of a size to per mit the saw to be projected therethrough. The guard has suitable runners 20 secured vto itslower edge which rest on the ice andsupport the guard when the saw is in operation.

,Each of the sides 15 is provided with an elongated opening 21 to receive the saw-supporting means, said openingpermitting the guard to have'V av certain amount 'ofvertical lmovement relative to the saw. The saw f is mounted on a shaft which is journalled fin a gear box or head 22 carried by the end of the arm 4 all as shown in the vabove-mentioiled atent. One of thesides 15 of ther guard is ocated between the saw Band the gear be 22 andthe openingai in saidt side-receives the portonof-the shaft which extends' be@ ico ill

tween the gearbox and the saw. 'I he opening 2l in the other side receives the free end 23 of the saw shaft.

l/Vhen the saw is lowered from the position shown in Fig. 2 to that showny in Fig. l, the saw and guard will move downwardly together until the runners 20 of the guard rest on the ice 6, after which the saw is lowered relative to the guard and brought into its operative position, said saw being Vat this time projected through the open bottomy lofthe guard. As stated above the openings 2l in the sides of the guard are of sufficient dimension to permit this relative movement of the saw and guard. Allfhen the saw is raised from the position shown in Fig. l to that shown in Fig, 2, the initial upward movement of the saw will be one relative to the guard G. The guard is resting on the icer and will continue so to do until the sawlias ,been carried up `to a point where the saw shaft engages the top of the ropenings 2i. Thereafter duiy ing the final upward movement of the saw the guard will be picked up by the saw and carried up therewith. A f

The size of the openings and the dimensions of the guard are such that when thesaw is raised into a position where the saw shaft engageswthe upper sides of the =openings as shown in'Fig 2 said saw will be drawn entirely into the guard andwill be completely protected thereby- The guard, therefore, will not be lifted kfrom the ice during the raising of the saw until the saw is entirely enclosed `in lthe guard and hence the saw isthroughly guarded or protected at all times and inl all positions. r

The guard is maintained in proper position by means of a brace or strut member 24 which is connected to the rear end of the guard and is also connected to the rock shaft 10 of the sled or carriage. This connection 2helps to maintain the guard in correct position relative tothe saw. u p

A'supplementary guard member 25 is provided on one side of the main guard, this being in the form of an iron which is attached to the runners 2O and is bent into the shape shown in Fig. 3. This supplementary guard extends under the gear box 22 and serves to prevent anything from getting between` the surface of the ice and saidgea-r box.

On the other side of the body of the guard vis another supplementary guard y26 which connects the two runners 2Oy and forms the lower limit of the .opening y21. These supplementary guards 25 and 26 are bowed `routwardly from the main guard and serve `to* prevent any ones foot fromslipping or getting caught under the saw between the runners.

Because of the open-work character ofthe guard there is no danger thatit will become 'clogged upwith particles of ice which are thrown up by the saw or will become frozen up by water thrown up bythe saw. Such particles of icey and drops of water will be thrown through the guard instead of accumulating on ,the top thereof and thus there is very little likelihood that the guard will become clogged with ice, n

'I claim:

lj In an ice-cutting machine, the combination vwith vertically-movable saw-supporting means and a saw carried thereby, of a guard ,enclosing they saw and capable of vertical movement relative'thereto, said guard resting On the ice when thesaw is operatively-cutting the ice and'being supported by the saw-supportingineans when the saw is raised from the ice. f y

2. In anice-cutting machine, the combination with vertically-movable saw-supporting means and afsaw carried thereby, of a guard enclosing ythe saw and capable of vertical movement relative thereto, said kguard resting on the ice when ythe 'saw is operatively cutting the ice and being supported by the sawsupporting means ywhen the jsawis raised from the ice, the dimensions of the, guard being such thatit entirely encloses the saw when the latter is raised. i

3.' In an ice-cuttingmachine, the combinaf tion with lvertically-movable saw-supporting means and a saw carried thereby, of a guard enclosing the saw and movable vertically relative thereto, said guard being constructed torest on the ice when the saw is in cutting position and having .an opening in its bottom throughvvwhich the saw extends, and also berest kon the ice when the saw is 4in cutting posiy tion and having an opening in its bottom through which the sawextends, and also being supported by the saw-supporting means when the :saw is raised from the ice, the diymension of the guard being such that it entirely encloses `thelksaw when the llatter is raisedposition. y

,5. In an ice-cutting machine, the combination with vertically-movable saw-supporting means and a saw carried thereby, of a guard enclosing thefsaw and adapted to have vertical movement relative thereto, saidjguard bef ing'p'rov'ided with runners to rest on the ice whenthe saw .is in lowered position and havinganopening in its bottom` throughwhich the saw extends .and also being supported by the saw-supporting vmeans when the saw is raised from the ice.

6.' In an ice-cnttingmachine, the combination with vertically-movable saw-supporting means anda sawcarried thereby, of an openwork guard enclosing the saw and capable of vertical movement relative thereto, said guard resting on the ice when the'saw is operatively cutting the ice and being supported by the saw-supporting means when the saw is raised from the ice.

7. In an ice-cutting machine, the combination withrvertically-movable saw-supporting means and a saw carried thereby, of an openwork guard enclosing the saw and capable of vertical movement relative thereto, said guard resting on the ice when the saw is operatively cutting the ice and being supported by the saw-supporting means when the saw is raised from the ice, the dimensionsV of the guard being such that it entirely encloses the saw when the latter is raised. I

8. The combination with a sled, of an arm pivoted thereto, a saw rotatably mounted on the arm, a motor on the sled for operating the saw, a guard enclosing the saw and capable of vertical movement relative thereto, said guard resting on the ice when the saw is in operative position and being supported by the arm when the saw is raised, and a connec tion between said guard and said frame.

9. The combination with `a sled, of an arm pivoted thereto, a saw rotatably mounted on the arm, av motoren tliesled for operating the saw, a guard enclosing thesaw and capable of vertical movement relative thereto, said guard resting on the .ice when the saw is in lname to this specification.

PLINY E. HUSSEY. 

